The Samsung Galaxy Note 4 Extra Battery Kit comes with a spare battery and a charging station that you can also use as a protective case for the battery when traveling or around the hous. The included lithium-ion battery has a 3220mAh capacity and oem and made specifically for the Samsung Galaxy Note 4 smartphone . This extra battery kit will allow you charge a battery while your using your original battery or vise versa. The note 4 kit will include a usb to use while charging up your note 4 smartphone and can be powered using the charger that's included with the Galaxy Note 4; an additional charger is not included with the kit.